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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 2005/02/01 volume: 12 issue: 2 until 2007/03/31 volume: 14 issue: 2.)
ProQuest SciTech Premium Collection
(Available from 2005/02/01 volume: 12 issue: 2 until 2007/03/31 volume: 14 issue: 2.)